A baffle type one-way overspeed shutoff valve which comprises a valve body, valve cover, valve plate, glass windows and reposition handle, which is characterized in that the valve body is arranged in a corner frame is composed of vertical frame and the bottom plate, on the vertical frame are hinged on the test plate on the vertical frame is also arranged on the two, three or four dry reed contacts the dry reed contacts; in the test plate is hinged on the support base plate on the active plate, the lower side of the plate two in the corresponding adjustable reed position are respectively provided with a magnet, a spring screw mechanism is arranged between the movable plate and the bottom plate, the valve plate is fixed on the side of the active plate in the valve body; the oil outlet end is provided with a reset reset reset shaft shaft, the handle is fixed on the shaft of the valve body side, reset shaft in the valve body is also provided with a reset shifting claw; the valve cover is provided with two flip, the valve cover and the two cover were composed of independent Connection bin and detection exhaust chamber. The utility model has the advantages of small flow rate setting error, strong seismic performance, small error probability, good sealing and long service life, etc..
【技术实现步骤摘要】
挡板式单向超速关闭阀
本技术属于油侵式电力变压器辅助安全保护装置
,具体地说是一种安装在变压器与储油柜的联管中的挡板式单向超速关闭阀。
技术介绍
目前,当变压器由于内部故障或其他原因,引起油的大量外溢、泄漏时,该阀具有“一排油即关闭”的功能,可立即切断储油柜与变压器间的油路,使储油柜不再给变压器补油,是油侵式电力变压器理想的辅助安全保护装置,也是带充氮灭火装置的油侵式变压器必须安装的组件。但是,由于现有的结构存在缺陷,使用时往往出现多种问题,具体如下:1、活络板上端套装在复位转轴上,接触面积大,摩擦阻尼大,影响泄漏的关闭灵敏度,在流速设定时会产生误差,即在油外溢或泄漏时,活络板上的阀板不能立即切断储油柜与变压器间的油路;2、活络板上端套装的复位转轴贯穿于靠近阀盖的阀体上,固定干簧接点的支架悬于活络板的侧上部,阀板能保持稳定的半开状态,一是靠活络板上的磁铁与干簧接点的相互吸引、二是复位机构中拉簧支撑,但是一旦磁铁退磁、拉簧弹力失效或者剧烈震动的情况下,阀板会在重力的作用下关闭,造成误动作;3、复位转轴与阀体之间的螺纹套易松动漏油,且不易二次拧紧;4、阀 ...
【技术保护点】
一种挡板式单向超速关闭阀,它包括阀体、阀盖、阀板、玻璃视窗和复位手柄,其特征是:所述阀体内设置有一角架,该角架由立架和底板组成,在立架上铰接有向底板倾斜的测试拨叉,在立架上还设置有平行于测试拨叉的两个、三个或四个干簧接点,在测试拨叉上侧的立架上还设置有复位连杆,在复位连杆与测试拨叉上沿之间连接有复位弹簧;在测试拨叉上支撑有铰接在底板上的活络板,在活络板下侧对应干簧接点的位置各设置磁铁,在活络板与底板之间设置有拉簧螺杆机构,在活络板上侧固定有阀板;在阀体出油口端处设置有复位转轴,复位转轴在阀体外的轴端固定有复位手柄,在阀体内的复位转轴上还设置有复位拨爪;所述的阀盖上设置有两个 ...
【技术特征摘要】
1.一种挡板式单向超速关闭阀,它包括阀体、阀盖、阀板、玻璃视窗和复位手柄,其特征是:所述阀体内设置有一角架,该角架由立架和底板组成,在立架上铰接有向底板倾斜的测试拨叉,在立架上还设置有平行于测试拨叉的两个、三个或四个干簧接点,在测试拨叉上侧的立架上还设置有复位连杆,在复位连杆与测试拨叉上沿之间连接有复位弹簧;在测试拨叉上支撑有铰接在底板上的活络板,在活络板下侧对应干簧接点的位置各设置磁铁,在活络板与底板之间设置有拉簧螺杆机构,在活络板上侧固定有阀板;在阀体出油口端处设置有复位转轴, 复位转轴在阀体外的轴端固定有复位手柄,在阀体内的复位转轴上还设置有复位拨爪;所述的阀盖上设置有两个翻盖,阀盖与两个翻盖分别组...
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